So I had an idea to speed up decimal -> hex conversions by using a lookup table but I'm having problems in making such a reporter
In this project
there is the original pen library blocks that I'm using as a reference
Then there is my simple lookup version
which is 2 times slower - this is due to Snap! having to decode the list reporter values
Then there is one where I use a pre-computed lookup list
and that gives me the expected speedup (4 times) over the original
But, then we have the problem that we need to create the global variable if it doesn't exist
hence version (3)
But it turns out, that the testing for variable existing takes a long time so this method is not a runner as its 11 times slower! 
So then I tried (4) in which I test to see if the block has been run before and only try the var creation on its first run
which speeds it up from (3) but is still 2 times slower than the original pen library reporter
At this point, I feel I'm only left with having to include a command block to initialise the global var
and I'll just have to include that at the start of any project that uses version (2)
Has anyone got any other ideas I could try (or a completely different fast method of converting to hex?)
FTAOD - No JavaScript wanted 
